Prague astronomical clock

Prague astronomical clock
Wonders of Prague



The Prague astronomical clock or Prague Orloj is a medieval astronomical clock attached to the Old Town Hall in Prague, the capital of the Czech Republic. The clock was first installed in 1410, making it the third-oldest astronomical clock in the world and the oldest clock still in operation.

Here are some useful links
https://www.prague.eu/en/object/places/3129/astronomical-clock